MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS

7

Modifying the physical properties of iron or steel by deformation

02

by cold working

04

of the surface

C

CHEMISTRY; METALLURGY

21

METALLURGY OF IRON

D

MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS

7

Modifying the physical properties of iron or steel by deformation

02

by cold working

04

of the surface

06

by shot-peening or the like

C

CHEMISTRY; METALLURGY

21

METALLURGY OF IRON

D

MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS

7

Modifying the physical properties of iron or steel by deformation

02

by cold working

04

of the surface

08

by burnishing or the like

C

CHEMISTRY; METALLURGY

21

METALLURGY OF IRON

D

MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS

10

Modifying the physical properties by methods other than heat treatment or deformation